In January alone, five senior officials from oil-rich Arab monarchies visited China to discuss cooperation on energy and infrastructure. Turkey’s top diplomat vowed to stamp out "media reports targeting China” in the Turkish news media, and Iran’s foreign minister pressed for progress on $400 billion of investment that China has promised his country.

As the United States, fatigued by decades of war and upheaval in the Middle East, seeks to limit its involvement there, China is deepening its ties with both friends and foes of Washington across the region.

China is nowhere near rivaling the United States’ vast involvement in the Middle East. But states there are increasingly looking to China not just to buy their oil, but to invest in their infrastructure and cooperate on technology and security, a trend that could accelerate as the United States pulls back.